A dual view display system that includes a display device and a first louver device. The display device is configured to display a first image at a display location to a first person at a first location and display a second image at the display location to a second person at a second location. The first louver device configured to substantially restrict a first field of view of the first image to the first person. The system may also include a second louver device configured to substantially restrict a second field of view of the second image to the second person. Such an arrangement restricts the fields of view so that, for example, a vehicle driver can not lean over and view something intended only for a vehicle passenger, such as a movie.
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1. A dual view display system comprising:
a display device configured to display a first image at a display location to a first person at a first location and display a second image at the display location to a second person at a second location; and
a first louver device configured to substantially restrict a first field of view of the first image to the first person, wherein the first louver device includes a layer of advanced light control film.
2. The system in accordance with
3. The system in accordance with
4. The system in accordance with
5. The system in accordance with
6. The system in accordance with
a display element configured to display the first image on a first portion of the display element and display the second image on a second portion of the display element distinct from the first portion;
an optical element configured to direct the first image to the first person and direct the second image to the second person.
7. The system in accordance with
a display element configured to display the first image during a first time period and display a second image during a second time period distinct from the first time period; and
an optical element interposed between the display element and the display location, said optical element configured to direct the first image to the first person during the first time period and direct the second image to the second person during the second time period.
8. The system in accordance with
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The invention generally relates to dual view displays for displaying images or information in distinct directions to distinct locations, and more particularly relates to a system that restricts the field of view of an image to a person viewing the image from a particular direction or location.
Dual view displays capable of showing different images to distinct persons viewing the display from different directions or locations have been proposed. Such displays can, for example, display navigation information to a vehicle operator while displaying a movie to a passenger. Some of the known dual view displays use a parallax barrier or patterned barrier to allow selected pixels on a display to be viewed from one direction and blocked when viewed from another direction. A description of such displays can be found in United States Patent Application Publication Number 2008/0001849 published Jan. 3, 2008 by Jin et al. and 2008/0061305 published Mar. 13, 2008 by Kim et al. Other dual view displays use a segmented backlighting source that directs light or emits light in a particular direction toward selected pixels by emitting light through apertures. The apertures are aligned with the pixels such that when the selected pixels are viewed from that particular direction, the selected pixels are more apparent than when viewed from another direction. A description of such a display can be found in U.S. Pat. No. 7,671,935 issued on Mar. 2, 2010 to Mather et al. In general, prior art devices rely on parallax angles and interlacing of images to display distinct images in different directions, and so the direction that each image is displayed depends on careful control of lateral alignment and separation distance between the pixels and the parallax barrier or segmented backlighting source.
In accordance with one embodiment of this invention, a dual view display system is provided. The system includes a display device, and a first louver device. The display device is configured to display a first image at a display location to a first person at a first location and display a second image at the display location to a second person at a second location. The first louver device is configured to substantially restrict a first field of view of the first image to the first person.
In accordance with an embodiment of this invention, the system also includes a second louver device configured to substantially restrict a second field of view of the second image to the second person.
Further features and advantages of the invention will appear more clearly on a reading of the following detailed description of the preferred embodiment of the invention, which is given by way of non-limiting example only and with reference to the accompanying drawings.
The present invention will now be described, by way of example with reference to the accompanying drawings, in which:
In accordance with an embodiment of a dual view display system 10,
In another embodiment, the system 10 may also include a second louver device 30 configured to substantially restrict a second field of view 38 of the second image 26 to the second person 18. As suggested in
Buy way of example and not limitation, equipping a dual view display system with louvers may be desirable to prevent the driver from being distracted from operating the vehicle by whatever image the passenger is viewing, for example a movie. The degree to which a field of view is restricted may be different for different directions or locations. For example, it may be desirable to more severely restrict the field of view directed to the passenger so the driver is discouraged from leaning far enough toward the passenger to view the image directed to the passenger. On the other hand, it may be desirable to less severely restrict the field of view shown to the driver so the passenger could readily lean over enough to view the image directed to the driver. Furthermore, the system 10 may be configured to display a third image, for example to a person sitting between the first person 14 and the second person 18, by configuring the display device 12 to display a third image to a third location and add a third louver device to restrict the viewing angle to the third location.
The display device 12 may also include an optical element 44 configured to direct the first image 24 to the first person 14 and direct the second image 26 to the second person 18. In this non-limiting example, the optical element 44 is illustrated as an image splitting fixed mirror that directs the first image 24 to the first person 14 and the second image 26 to the second person 18 via curved minors as illustrated. An advantage of this arrangement is that the images do not need to be multiplexed as is the case for an embodiment described below.
Accordingly, a dual view display system 10 for displaying different images in different directions from a common display location 22 is provided. By using an optical element 44, a system 10 displaying two distinct images may be provided for less cost than two separate displays. The arrangement of the display device 12 and optical element 44 do not require precise physical alignment as is the case with other dual view displays, particularly those relying on parallax to control the direction that images are displayed. Furthermore, in at least one embodiment described herein the full resolution of the display device is maintained for both images, unlike the parallax based dual view display devices that halve the resolution of each image relative to the resolution of the display to display two distinct images.
While this invention has been described in terms of the preferred embodiments thereof, it is not intended to be so limited, but rather only to the extent set forth in the claims that follow.
Harbach, Andrew P., Sarma, Dwadasi H. R., Kuhlman, Frederick F.
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